Table 1.
The level of bathochromic and hyperchromic in maximum absorption of anthocyanins of pear‐shaped variety of blueberry (Cornus mas–Macrocarpa) of tannic, coumaric, caffeic, and benzoic acids in four differing pH
| pH | Anthocyanin | Tannic acid | Coumaric acid | Caffeic acid | Benzoic acid | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| ∆A | ∆λ (nm) | ∆A | ∆λ (nm) | ∆A | ∆λ (nm) | ∆A | ∆λ (nm) | ∆A | ∆λ (nm) | |
| 1 | 135/1 | 510 | 482/0 | 0 | 484/0 | 5 | 675/0 | 5 | 655/0 | 5 |
| 2 | 118/1 | 505 | 562/0 | 5 | 49/0 | 0 | 721/0 | 0 | 432/0 | 5 |
| 3 | 667/0 | 51 | 27/0 | 5 | 207/0 | 0 | 035/0 | 0 | 015/0 | 5 |
| 4 | 201/0 | 520 | 09/0 | 10 | 067/0 | 10 | 001/0 | 5 | 088/0 | 10 |
∆A=0.721
∆A=0.001.